Lock for sliding doors



Model.)

J. M. TUNIS & W. P. BEDFORD.

LOOK FOR SLIDING DOORS.

No. 389,345. Patented Sept. 11, 1888.

WITNESSES: IIVI/EIVTOR Nirrr; STATES ATENT Fries.

JOHN M. TUNIS AND \VILLIAM F. BEDFORD, OF MADISON, NEW JERSEY.

LOCK FOR SLlDlNG DOORS.

SPECIFICATION forming part of Letters Patent No. 389.345, dated September 11, 1888.

Application filed April 10, 1888. Serial No. 270,199.

To all whom it may concern.-

Be it known that we, JOHN M. TUNIs and \VILLLLM F. BEDFORD, both of Madison, in the county of Morris and State of New Jersey, have invented a new and useful Improvement in Looks for Sliding Doors, of which the following is a full, clear, and exact description.

Our improvement is applicable to sliding doors or gates generally, including rolling sliding doors suspended from above and others, irrespective of the purpose for which the same may be used. It will be found particularly desirable, however, for sliding and rolling doors of street-ears and railroad freightears, or wherever, when the door is locked, it is desirable that it should be proof against being unlocked by jar.

The invention relates to that description of locks for sliding or rolling doors which comhincs both a latch and lock, or, in other words, provides for either the door being simply latched or locked by a removable key, as desired; and the invention consists in certain novel constructions and combinations of parts, substantially as hereinafter described, and pointed out in the claims, and whereby a good or efficient combined latch and lock which is both simple and durable can be produced at a moderate cost, no jar of any kind will unlock it, and the key, which is removable when the door is unlocked, is not liable to fall out of the door, the lock being a mortise one and out of the way and protected by the wood in which it is inserted, and, furthermore, not necessarily dependent upon springs for its operation.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 represents a front View of a sliding door and door-frame in part, with the lock ease or frame and latch-pocket in section, and having our invention applied. Fig. 2 is a horizontal section, upon a larger scale, on the irregular line 00 x in Fig. 1; Fig. 3, a vertical section in part, mainly upon the lines y y in Figs. 1 and 2; and Fig. 4, a side view of a key suitable for the lock.

A indicates the sliding door, and B the jamb (Model.

or that portion of the stationary frame against which the door closes.

G is an ordinary or any suitable drop-1atch let into a mortise or pocket, I), having a faceplate, a, in the door. This drop-lateh, which may be operated by knobs d on an attached knob-spindle, e, from either or opposite sides of the door, is free to rise and fall, and engages, when the door is shut,with or over the lower wall of the slot in the face-plate of the lock case or frame D, through which the nose of the latch enters, said lock ease or frame D being mortised in thejamb B of the door ease or frame. This construction so far simply provides for the self-latching of the door when shut to and for its being unlatched by suitably turning the knob-spindle 6, so as to raise the latch.

The mortised lock case or frame D, which is open at its sides, carries within it a tumbler or locking catch, E, having attached side pivots, f, which have their bearing in opposite side guards, m, secured to the frame D, or which may be otherwise carried within the frame D; but the guards are preferred as affording a limited protection against picking of the lock. The pivotsf, which provide for oscillating the tumbler E, are in line with the keyhole g and openings in the keyhole faceplates h on opposite sides of the jamb B, or it may only be on one side where the door is not designed to be locked from both sides. These pivots f serve to receive over them the hollow shank of the key G, the bit it of which engages with an aperture,t',in the tumbler E, so

that upon suitably turning the key in reverse directions the tumbler E may either be turned into an upright position, as shown by dotted lines in Fig. 1, to bear down byits lower nose end, 70, upon the top of the latch O to lock or hold it closed when the door is shut, or said tumbler may be swung to one side out of the way of the latch, as shown by full lines in Fig. 1, to provide for the working of the latch and to make the door simply a latch one. A spring, Z, may, if desired, be applied to the tumbler E, to put friction upon it, so as to insure the tumbler being held in either of its set positions; but such spring is not what may be termed an operating part of the lock.

The key is not restricted to the construc tion here shown, and it may be made to engage with and disengage from the locking catch or tumbler in various ways.

5 Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is*- 1. In a lock for sliding doors, the combina- ,tion,with a casing into which a latch is adapted IC to project and engage, of a catch provided with pivots having hearings in the side of the casing, the said pivots forming posts adapted to enter the barrel of a key, the bit of which engages the said catch, substantially as herein 15 shown and described.

2. In a lock for sliding doors, the combina- JOHN M. TUNIS. XVILLIAM F. BEDFORD.

Witnesses:

J OHN W. CLIFT, FRED B. BARDON. 

